* {
    margin: 0;
    padding: 0;
    text-decoration: none;
    list-style: none;
}


/* 版心样式 */

.w {
    width: 1400px;
    margin: 0 auto;
}


/* banner部分 */

.banner a {
    display: block;
    width: 1920px;
    margin: 0 auto;
    height: 440px;
}


/* 导航栏部分 */

nav ul {
    display: flex;
    justify-content: space-between;
    width: 880px;
    height: 66px;
    margin: 0 auto;
}

nav ul li {
    width: 75px;
    height: 100%;
    line-height: 66px;
    text-align: center;
}

nav ul li:first-child a {
    color: #0eaf81;
    border-bottom: 2px solid #0eaf81;
}

nav ul li a {
    display: block;
    font-size: 14px;
    color: #000;
}

nav .introduce {
    display: flex;
    margin-top: 26px;
    width: 100%;
    height: 542px;
}

.introduce-img {
    width: 720px;
    height: 100%;
}

.introduce-content {
    flex: 1;
    margin: 85px 46px 0 20px;
    font-size: 14px;
}

.introduce-content h2 {
    font-weight: 400;
    font-size: 30px;
    color: #0db083;
    margin-bottom: 30px;
}

.introduce-content p:nth-child(2) {
    color: #797979;
    line-height: 32px;
    margin-bottom: 35px;
}

.introduce-content p:nth-child(3) {
    color: #acacac;
    line-height: 25px;
}


/* 展示部分 */

.show {
    position: relative;
    width: 1920px;
    height: 325px;
    margin: 0 auto;
    margin-top: 55px;
    background: url(../images/show-bg.png)no-repeat;
}

.show-content {
    display: flex;
    justify-content: space-around;
    padding: 124px 50px;
}

.show-content li {
    display: flex;
    flex-direction: column;
    color: #0eaf81;
    font-size: 18px;
    text-align: center;
}

.show-content li span:first-child {
    font-size: 48px;
}


/* 科技快讯部分 */

.news {
    margin-top: 80px;
}

.news-hd {
    text-align: center;
    color: #575757;
    font-size: 14px;
}

.news-hd h2 {
    font-size: 24px;
    color: #101010;
    font-weight: 400;
    margin-bottom: 5px;
}

.news-bd {
    display: flex;
    justify-content: space-between;
    height: 230px;
    margin: 45px 0 55px;
}

.news-bd li {
    width: 330px;
    height: 100%;
    background-color: #28166f;
}

.news-bd li a {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
}

.news-bd li a span {
    position: absolute;
    width: 100%;
    height: 54px;
    left: 0;
    bottom: 0;
    background-color: #201c2e;
    color: #fff;
    text-align: center;
    line-height: 54px;
}

.more {
    width: 176px;
    height: 44px;
    margin: 0 auto;
}

.more button {
    width: 100%;
    height: 100%;
    background-color: #fff;
    color: #424242;
    outline: none;
    border: 1px solid #b2b2b2;
    border-radius: 5px;
}


/* 底部部分 */

footer {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 345px;
    margin-top: 76px;
    background-color: #273037;
    overflow: hidden;
}

.zixun {
    display: flex;
    flex: 1;
    margin: 40px auto 0;
}

.zixun-left {
    display: flex;
    flex-direction: column;
    width: 182px;
    font-size: 24px;
    color: #0eaf81;
}

.zixun-left h5 {
    position: relative;
    font-weight: 400;
    font-size: 18px;
    color: #fff;
    margin-bottom: 5px;
}

.zixun-left h5::before {
    position: absolute;
    content: "";
    top: 0;
    left: -10px;
    transform: translateX(-100%);
    width: 26px;
    height: 25px;
    background: url(../images/kefu.png)no-repeat;
}

.zixun-left img {
    width: 111px;
    height: 111px;
    margin-top: 5px;
}

.zixun-right {
    flex: 1;
    display: flex;
    justify-content: space-between;
    margin: 0 166px;
}

.zixun-right dl dt {
    color: #fff;
    font-size: 18px;
}

.zixun-right dl dd a {
    font-size: 14px;
    color: #8f8f8f;
    line-height: 38px;
}

.copyright {
    width: 1290px;
    height: 55px;
    margin: 0 auto;
    border-top: 1px solid #363e45;
    font-size: 14px;
    color: #676767;
    text-align: center;
    line-height: 55px;
}